Unlike other bed assist rails, the innovative Smart-Rail has two positions: closed and open. While closed, it provides support for making adjustments while in bed. In the open position, it pivots out from the bed and touches down to the ground to assist in transferring to a standing position.Height adjustable in both positions, to accommodate various mattress thicknesses and standing heightsA 16.5" gripping surface provides maximize leverageEasy to install - no tools required. Frame slides between the box spring and mattress, secures to bed frame with safety strap.Supports up to 300lbsLimited Lifetime WarrantyRail Height Range: 27-36"